Punch



M. MAROIL.

(No Model.)

PUNCH.

N0. -358,683. Patented Mar. 1, 1887.

witnesses n. FETER5. Phuto-Lilhognpiwr. wumn m a c UNITE STATE MICHEL MAROIL, OF AMHERST, MASSACHUSETTS.

PUNCH.

SPECIFICATIQN forming part of Letters Patent No. 358,683, dated March 1, 1887.

Application filed DecemhcrQQ, 1886. Serial No. 222,244. (No model.)

and its die are mounted upon and operated by levers of thefirst order.

The object of my invention is to provide such punches with means whereby the punch and its die, in moving toward and away from each other, will have a rectilinear instead of a curvilinear movement, as heretofore.

To this end my invention consists in a handpunch, in which the punch and its die are mounted upon secondary levers pivoted to and operated by primary levers in such manner that the outer ends of said secondary levers will approach and recede from each other in a straight line.

My invention consists, further, in certain details of construction, hereinafter fully described, and particularly pointed out in the claims.

Referring to the drawings, in which like letters and figures designate like parts through out, Figure 1 is a side elevation of a punch constructed according to my invention. Fig. 2 is a similar view thereof, showing the parts in another position. Fig. 8 is a side elevation of a common form of punch heretofore in use.

Referring in the first place to Fig. 3, the numerals 1 2 designate two levers having respectively the short arms 4 5, and pivoted together at 3. The lever 1 carries at the end of its short arm the die 6, and lever 2 carries, in a similar manner, the punch 7. Such construction constitutes one example of the ordinary hand-punch. In punches constructed in this manner it will be observed that when the punch and its die approach and recede from each other they move upon the arc of a circle whose center is the pivot 3, as clearly indicated by the dotted lines in said figure, and it follows, of course, that an eyelet made by such punch will extend through the material in which it is made in a curved line corresponding thereto. This curvature in the eyelet, while not perceptible in very thin material, becomes an important matter when the latter is of considerable thicknessas in leather belting for heavy machinery, for instance, where for many reasons it is desirable that the eyelets for making the connect-ion between the ends thereof should extend through the belt in a straight line.

In Figs. 1 and 2 I have shown the means devised by me for securing a rectilinear movement of the punch and die, and have shown such means applied to a belt-punch.

The letters A B designate two levers pivoted together at O, and having respectively the short arms G and F. These levers may be pro vided with the usual leaf-spring, D, secured to one of the levers by screw E, or other means may be provided for normally retaining the levers in the open position shown in Fig. 1.

Instead of mounting the punch and its die directly upon the levers A B, which levers I will term the primary levers, I mount them upon the short arms M N, respectively, of levers H I, which I will designate as the sec ondary levers. These secondary levers, at about one-third their length from their outer ends, are pivoted to the outer ends of the primarylevers, as shown'at a and I). It will thus be seen that the secondary levers are capable ofindependent movement upon their pivots, and consequently that by properly guiding the rear ends of said levers the curvilinear movement of pivots a I) about pivot G can be converted at the outer ends of said secondary levers into a rectilinear movement. It is obvious that there are many ways of guiding the inner ends of the secondary levers to accomplish this result; but I prefer and have shown means for the purpose consisting of studs 0 d, seated in the ends of said levers, said studs passing through and traveling in slots K L in the primary levers A B. As shown, the said levers are stamped into a thin web for a sufficient distance to contain the slots; but independent plates having slots therein could be welded or otherwise secured to the levers, if desired.

The studs 0 (I may be provided with retain- I ing-heads upon the side of the slots opposite the ends of the levers; but I prefer to provide the levers with projecting ears to extend upon both sides of the slots, and to connect said cars by the studs passing through the slots.

As previously stated, the punch and its die are mounted upon the outer ends of the secondary levers, and I have shown theusual revolving head, 0, journaled upon the end of lever H,and havingthe punches P, of different sizes, secured to its periphery. A spring, R,'secured to said lever at r, carries a tooth which drops into notches in a flange, Q, upon the head to prevent accidental rotation thereof. The letter S designates the usual die, which is mounted upon the lever I, as shown. It will be understood that this particular construction of punch and die is shown for the purpose of illustration merely, and forms no part of my invention. A

It will be observed thatthe levers and their pivots are so arranged that pivot G of the primary levers is located at a point about midway between pivots a b and studs 0 d of the secondary levers,- and that the slots K L extend in a-direction substantially at a right angle to a straight line drawn through the punch and its die, when the latter are in contact, as shown in Fig. 2. I

It follows from this arrangement of parts that when the primary levers are operated to cause the punch and die to approach each other the studs sliding forward within the slots to the position shown in Fig. 2 will turn the secondary levers upon their pivots sufficiently to give a rectilinear movement to said punch and die, and that when said primary levers are movedin the opposite direction, either positively or by spring D, the studs will slide backward to the position shown in Fig. 1, with a like result to the punch and die. The movement of the punch andits die, therefore, will be rectilinear throughout, and an eyelet cut thereby will extend in a straight line through the material, whether the latter be thick or thin.

The principle illustrated by my invention is applicable to all kinds of hand-pu11ches,and to pliers and other similar instruments where it would be useful or desirable.

I do not wish to limit myself to the exact details of construction shown and described, as it is obvious that modifications could be made therein without departing from the spirit of my invention.

I claim 1. In a hand-punch, two secondary levers carrying at their outer ends a punch and its die, two primary levers pivoted together near their outer ends, and pivots connecting the former levers to the outer ends of the latter levers, in combination with means, substantially as set forth, for coupling the inner ends of said secondary levers to the primary levers, substantially in the manner set forth, whereby movement of said primary levers about their pivot will impart a rectilinear movement to the punch and die.

2. In a hand-punch, the combination, with two primary levers pivoted together near one end thereof, of a secondary lever pivoted to the end of each of said primary levers, said secondary levers each consisting of a short arm extending beyond the ends of the primary levers, and a long arm extending to the rear of the pivot connecting said latter levers, a punch and its die mounted upon the ends of the short arms of the secondary levers, and means for connecting the long arms of said secondary levers to the primary levers in such manner as to permit a limited movement of tially as described, for guiding the inner ends of said secondary levers by means of said slots.

4. In a hand-punch, the combination of the primary levers A B, pivoted together at G, and having the slots K L, with the secondary levers H I, pivoted to the primary levers a b, said secondary levers having mounted upon their outer ends a punch and its die, and having studs 0 d at their inner ends passing loosely through the slots in the primary levers, said parts being so arranged that pivot G will be at a point about midway between pivots a b and studs 0 d, as and for the purpose set forth.

MICHEL MAROIL.

\Vitnesses:

W. A. DICKINSON, V ANDREW G. SYDEL Jr. 

